JP2004188539A - Saw blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a saw blade of a long service life in which thickness direction vibration of a saw blade is restricted, and in which a cutting bend resistance is improved. <P>SOLUTION: This saw blade 1 is provided with a group of leading teeth including at least one straight tooth 1S, a group of first following teeth comprising a plurality of set teeth, and a group of second following teeth comprising a plurality of set teeth having smaller tooth height than the tooth height of the group of the first following teeth, and having larger set projection quantity than the set projection quantity of the group of the first following teeth. The number of the set teeth in the group of the second following teeth is set to be larger than the number of the set teeth in the group of the first following teeth. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a saw blade used for a band saw, a bow saw or a circular saw. More specifically, the present invention relates to a saw blade capable of improving the bending resistance when cutting a workpiece and extending the life of the saw blade.
[0002]
[Prior art]
A band saw machine is widely used as a machine for cutting a bar-shaped, long and large metal material. In a band saw blade, which is a cutting tool used in this band saw machine, for example, in order to cope with chattering vibration and noise, a pattern of a set (rake) is set in a laker set, a wave set, or a straight set. (Straight set) or the like.
[0003]
In addition, for difficult-to-cut materials such as stainless steel, as a method of suppressing noise, reducing cutting resistance, and improving the life of the saw blade, providing a height difference between saw teeth in the saw blade and changing the amount of protrusion of the set Such a saw blade (for example, Japanese Patent Publication No. 7-24973) has also been developed. In particular, in a technique for suppressing an increase in noise and cutting resistance, a method of changing a height difference of teeth constituting a saw blade and a projection amount of a set is generally used.
[0004]
[Problems to be solved by the invention]
As described above, as a technique for suppressing an increase in noise and cutting resistance and improving the life of a saw blade, a technique for providing a height difference to each saw tooth and changing a projection amount of a set is generally used. This technology focuses on reducing the load on each tooth by equally distributing the kerfs in the running direction or cutting direction of the saw blade for each tooth, and dividing the chips into chips. It was done.
[0005]
However, the conventional countermeasures do not consider the resistance of the saw blade in the thickness direction. That is, a general saw blade is composed of straight teeth that do not bend left and right and set teeth that are bent left or right, and each tooth protrudes into the work material when cutting the work material. When the straight teeth are swung in the left and right direction (thickness direction of the saw blade), the amount of rotation is relatively small. However, in the case of right set teeth or left set teeth, the straight teeth are largely swung right or left. This is a major cause of vibration in the thickness direction.
[0006]
At this time, for example, in the case where all of the set teeth have the same set protrusion, the force caused by the vibration in the left-right direction is equally received by all set teeth. In the case of a saw blade having teeth different from each other, the set tooth having the largest set projection amount receives a force due to vibration in the left-right direction.
[0007]
Here, in the case of a saw blade having teeth with different set protrusion amounts of the set teeth, the number of set teeth subjected to the force due to the vibration in the left-right direction is compared with a saw blade having the same set protrusion amount of the set teeth. As a result, the resistance to vibration in the left-right direction is reduced, resulting in an unstable state.
[0008]
Further, in the above-described method of changing the height difference of the teeth constituting the saw blade and the amount of protrusion of the set, the load applied to one tooth can be reduced, but the partial work amount of each tooth increases. There is. That is, wear progresses quickly at the corner portion of the set tooth where the set projection amount is the largest, and in this portion, as described above, the vibration in the left-right direction becomes more unstable, and the life of the saw blade is shortened. There is a problem that "curving", which is one of the causes, is likely to occur.
[0009]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a long-life saw blade that suppresses vibration in the thickness direction of the saw blade and has improved anti-bending characteristics. That is.
[0010]
[Means for Solving the Problems]
As a means for solving the above-mentioned problem, the saw blade according to claim 1 includes a leading tooth group including at least one straight tooth, a first trailing tooth group including a plurality of set teeth, and the first trailing tooth group. A second succeeding tooth group having a plurality of set teeth having a tooth height smaller than the tooth height of the tooth group and having a set protrusion amount larger than the set protrusion amount of the first subsequent tooth group. The gist is that the number of set teeth of the second subsequent tooth group is set to be larger than the number of set teeth of the first subsequent tooth group.
[0011]
3. The saw blade according to claim 2, wherein the leading tooth group includes at least one trapezoidal tooth, the first trailing tooth group includes at least one trapezoidal tooth with left and right sets, and the first trailing tooth. A second succeeding tooth group consisting of trapezoidal teeth or flat teeth having a tooth height smaller than the tooth height of the tooth group and having a left and right set projection amount larger than the set projection amount of the first subsequent tooth group. In the saw blade, the number of set teeth of the second subsequent tooth group is set to be larger than the number of set teeth of the first subsequent tooth group.
[0012]
4. The saw blade according to claim 3, wherein the leading tooth group includes at least one trapezoidal tooth, a first right flat tooth protruding rightward outward from a ridgeline of a cutting edge of the trapezoidal tooth, and A first trailing tooth group having a plurality of first left spur teeth protruding leftward outward from the ridge line of the cutting teeth; and a tooth height smaller than the tooth height of the first trailing tooth group. A plurality of set teeth including a second left spur tooth having a leftward set protrusion amount larger than a set set protrusion amount of the first subsequent tooth group and a second right flat tooth having a right set protrusion amount. And the second trailing tooth group consisting of: wherein the number of set teeth of the second trailing tooth group is greater than the number of set teeth of the first trailing tooth group. Is what you do.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
FIGS. 1A, 1B and 1C show a first embodiment of a saw blade having a saw blade configuration according to the present invention, and the saw blade 1 is viewed from the right side in FIG. 1A and FIG. Toward the left, the first preceding tooth, the straight tooth 1S, the succeeding tooth, the right set tooth 1Rl, the left set tooth 1Ll, the right set tooth 1Rh, and the second preceding tooth, the right set tooth 1Rl. A group (eight-pattern) is constituted by eight teeth 1S and left set teeth 1Lh, right set teeth 1Rl and left set teeth 1Ll, which are succeeding teeth following the preceding teeth.
[0015]
Referring to FIGS. 1A and 1B, one group of the saw blade 1 includes a leading tooth group including at least one straight tooth, a first trailing tooth group including a plurality of set teeth, and the first tooth group. There is a second succeeding tooth group having a plurality of set teeth having a tooth height smaller than the tooth height of the one subsequent tooth group and having a set protrusion amount larger than the set protrusion amount of the first subsequent tooth group.
[0016]
The first subsequent tooth group is a group having a large tooth height, and includes a right set tooth 1Rh and a left set tooth 1Lh. The second subsequent tooth group is a group consisting of a plurality of set teeth having a tooth height smaller than the tooth height of the first subsequent tooth group and having a set protrusion amount larger than the set protrusion amount of the first subsequent tooth group. The right set tooth 1Rl and the left set tooth 1Ll are included.
[0017]
The tooth height of the saw tooth is the distance from the tooth height reference position SHL set on the back side of the saw blade to the tip of the tooth, and the tooth height of the right set tooth 1Rl and the left set tooth 1Ll is 1, When the tooth height of the set tooth 1Rh and the left set tooth 1Lh is h and the tooth height of the straight tooth 1S is s, the relationship is h>s> l.
[0018]
In addition, the set protrusion amount of the right set tooth 1Rl and the left set tooth 1Ll of the second subsequent tooth group is set to be larger than the set set protrusion amount of the first subsequent tooth group. That is, when the set protrusion amount of the right set tooth 1Rl and the left set tooth 1Ll is w and the set set protrusion amount of the right set tooth 1Rh and the left set tooth 1Lh is n, w> n is set.
[0019]
Further, the number of set teeth (1Rl, 1Ll) of the second succeeding tooth group is greater than the number of set teeth (1Rh, 1Lh) of the first subsequent tooth group.
[0020]
In other words, in the saw blade 1 composed of eight groups (eight patterns) including three groups of the straight tooth group, the high tooth height set tooth group, and the low tooth height set tooth group, the set output is the largest. In addition, the number of set teeth having a low tooth height is the largest (four in the embodiment) in the one group.
[0021]
In the saw blade 1, by maximizing the number of set teeth having a large set protrusion amount, there is an effect of dispersing a load applied to the corners of the set teeth having a large set protrusion amount during cutting. As a result, it is possible to suppress the progress of abrasion at the corners of the set teeth where the abrasion protrusion amount is the fastest in the wear progress.
[0022]
Further, with respect to the vibration in the thickness direction of the saw blade 1, the number of set teeth having a large set protrusion amount is made the largest in a group constituting the saw blade 1, so that more teeth receive vibration in the thickness direction. Therefore, the resistance to vibration can be increased.
[0023]
With the above-described operation and effect, the bending resistance can be improved, and the life of the saw blade can be prolonged.
[0024]
FIGS. 2A, 2B and 2C show a second embodiment of a saw blade having a saw blade configuration according to the present invention. FIG. As shown in b), from right to left, 7 of straight teeth 2S, right set teeth 2Rl, left set teeth 2Ll, right set teeth 2Rh, left set teeth 2Lh, right set teeth 2Rl, and left set teeth 2Ll. One group (seven-pattern) may be constituted by teeth.
[0025]
As shown in FIGS. 2A and 2B, one group constituting the saw blade 2 includes a leading tooth group including at least one straight tooth and a plurality of set teeth, as in the first embodiment. And a plurality of set teeth having a tooth height smaller than the tooth height of the first subsequent tooth group and having a set protrusion amount larger than the set protrusion amount of the first subsequent tooth group. And a second group of subsequent teeth.
[0026]
The first subsequent tooth group is a group having a large tooth height, and includes a right set tooth 2Rh and a left set tooth 2Lh. The second subsequent tooth group is a group consisting of a plurality of set teeth having a tooth height smaller than the tooth height of the first subsequent tooth group and having a set protrusion amount larger than the set protrusion amount of the first subsequent tooth group. And right set teeth 2Rl and left set teeth 2Ll.
[0027]
When the tooth height of the right set tooth 2Rl and the left set tooth 2Ll is 1, the tooth height of the right set tooth 2Rh and the left set tooth 2Lh is h, and the tooth height of the straight tooth 2S is s, h>s> l Is in a relationship.
[0028]
In addition, the set protrusion amount of the right set tooth 2Rl and the left set tooth 2Ll of the second subsequent tooth group is set to be larger than the set set protrusion amount of the first subsequent tooth group. That is, when the set protrusion amount of the right set tooth 2Rl and the left set tooth 2Ll is w, and the set protrusion amount of the right set tooth 2Rh and the left set tooth 2Lh is n, w> n is set.
[0029]
Further, the number of set teeth (2Rl, 2Ll) of the second succeeding tooth group is provided more than the number of set teeth (2Rh, 2Lh) of the first subsequent tooth group (four teeth in the embodiment).
[0030]
Alternatively, like the saw blade 3 of the third embodiment shown in FIG. 3 (a, b, c), straight teeth 3S, right set teeth 3R1, right set teeth 3R1, left set teeth 3Lh, right set teeth 3Rh, One group (seven patterns) may be constituted by seven teeth of the left set tooth 3Ll and the left set tooth 3Ll.
[0031]
Alternatively, the saw tooth of another set pattern having a plurality of straight teeth 3S, right set teeth 3Rl, right set teeth 3Rh, left set teeth 3Ll, and left set teeth 3Lh may be provided.
[0032]
In addition, the saw blade 3 may be formed of three or more types of set groups having three or more types of tooth heights different from the tooth height reference position SHL to the tip of the tooth, and having different sets of protrusion amounts.
[0033]
In the configuration of the saw blade 3, as in the case of the saw blade 1, the first subsequent tooth group is a group having a large tooth height, and includes a right set tooth 3Rh and a left set tooth 3Lh. The second subsequent tooth group is a group consisting of a plurality of set teeth having a tooth height smaller than the tooth height of the first subsequent tooth group and having a set protrusion amount larger than the set protrusion amount of the first subsequent tooth group. And right set teeth 3Rl and left set teeth 3Ll.
[0034]
Further, the set protrusion amount of the right set tooth 3Rl and the left set tooth 3Ll of the second subsequent tooth group is set to be larger than the set set protrusion amount of the first subsequent tooth group. That is, when the set protrusion amount of the right set tooth 3Rl and the left set tooth 3Ll is w, and the set set protrusion amount of the right set tooth 3Rh and the left set tooth 3Lh is n, w> n is set.
[0035]
Further, the number of set teeth (3Rl, 3Ll) of the second succeeding tooth group is provided more than the number of set teeth (3Rh, 3Lh) of the first subsequent tooth group (four teeth in the embodiment).
[0036]
FIGS. 4A, 4B and 4C show a fourth embodiment of the saw blade according to the present invention, in which the saw blade 4 comprises one group (four-pattern) of four bee-shaped saw teeth. It was done.
[0037]
Referring to FIGS. 4A and 4B, from the right side to the left side, a trapezoidal tooth 4B as a leading tooth, a trapezoidal tooth 4F1 as a trailing tooth, and four trapezoidal teeth (or spur teeth) 4F2 and 4F2 constitute one. The group is composed.
[0038]
In addition, the above-mentioned “bee-shaped saw tooth” is also referred to as “bee tooth” because the shape of the tooth tip of the saw tooth is similar to the shape of “shachi” of shamisen. A bee tooth is a tooth in which the action of a left set tooth and a right set tooth in a normal shape tooth is given to one tooth.
[0039]
Also, trapezoidal teeth are chamfered on both sides of the tip of a bee tooth, and are called trapezoidal teeth because the tip is part of a trapezoid. In addition, the term “spur tooth” refers to a tooth that is not beveled and is a bevel tooth itself.
[0040]
By the way, among the trailing teeth of the saw blade 4 having a group of four teeth, a leading tooth group consisting of trapezoidal teeth (or spur teeth) and a first trailing tooth group consisting of a plurality of trapezoidal teeth or spur teeth are included. A second trailing tooth comprising a trapezoidal tooth or a spur tooth having a tooth height smaller than the tooth height of the first trailing tooth group and having a left and right set projection amount larger than the set projection amount of the first trailing tooth group. There is a group.
[0041]
The first subsequent tooth group is a group having a large tooth height, and includes a trapezoidal tooth 4F1. The second succeeding tooth group has a tooth height smaller than the height of the first succeeding tooth group and has trapezoidal teeth (or spur teeth) having left and right set protrusion amounts larger than the set protrusion amount of the first subsequent tooth group. And includes two trapezoidal teeth (or spur teeth) 4F2.
[0042]
When the tooth height of the trapezoidal tooth 4B as the leading tooth is b, the tooth height of the trapezoidal tooth 4F1 as the trailing tooth is h, and the tooth height of the trapezoidal (or spur) tooth 4F2 is l, b>h> l Is in a relationship. Further, when the set projection amount of the second subsequent tooth group is w and the set projection amount of the first subsequent tooth group is n, w> n is set.
[0043]
Further, the number of set teeth (4F2) of the second subsequent tooth group is set to be larger than the number of set teeth (4F1) of the first subsequent tooth group.
[0044]
In other words, in the succeeding teeth of the saw blade 4 in the four-group configuration, the number of saw teeth having a large set protrusion amount and a low tooth height is set to be larger than the number of the small set protrusion amount and the high tooth height. It is a feature.
[0045]
At the time of cutting using the saw blade 4 having the above-described configuration, the trapezoidal tooth or flat tooth (4F2) that is the trailing tooth or the flat tooth (4F2) that has the largest amount of left and right set protrusion is larger than the trapezoidal tooth 4B that is the leading tooth. The groove will be cut.
[0046]
At this time, by increasing the number of trapezoidal teeth or spur teeth which are the trailing teeth with the largest amount of left and right set projections, the load applied to the outer corners of the trapezoidal teeth or spur teeth which are the trailing teeth is dispersed. Can receive it. Thus, it is possible to suppress the progress of abrasion at the outer corners of the trapezoidal teeth or the spur teeth having the largest left and right set protrusion amounts. In addition, since the saw blade 4 receives the vibration in the thickness direction with more teeth with respect to the vibration in the thickness direction, the resistance to the vibration can be increased.
[0047]
With the above-described operation and effect, the bending resistance can be improved, and the life of the saw blade can be prolonged.
[0048]
FIGS. 5A, 5B, and 5C show a fifth embodiment of the saw blade according to the present invention, in which the saw blade 5 is composed of six beesaw-shaped sawtooth members forming a group (six-pattern pattern). It was done.
[0049]
Referring to FIGS. 5A and 5B, the trapezoidal tooth 5B which is the leading tooth, the two consecutive trapezoidal teeth 5F1 which are the trailing teeth, and the three consecutive trapezoidal teeth (or the flat teeth) One group is composed of six teeth 5F2.
[0050]
The same effect as the saw blade 4 can also be obtained with the saw blade 5 configured as one group (six patterns) with the six bee-shaped saw teeth described above. Alternatively, another pattern including a plurality of trapezoidal teeth 5B as the leading teeth, trapezoidal teeth 5F1 as the trailing teeth, and a plurality of trapezoidal teeth (or spur teeth) 5F2 may be used.
[0051]
When the tooth height of the trapezoidal tooth 5B is b, the tooth height of the trapezoidal tooth 5F1 that is the succeeding tooth is h, and the tooth height of the trapezoidal tooth (or spur tooth) 5F2 is 1, b>h> l. The set projection w of the trapezoidal tooth (or spur tooth) 5F2 is set to be larger than the set projection n of the trapezoidal tooth 5F1 (w> n). Further, the number of teeth of the trapezoidal teeth (or spur teeth) 5F2 is larger than the number of teeth of the trapezoidal teeth 5F1.
[0052]
The saw blade 5 has three or more types of trapezoidal teeth (or spur teeth) groups, which are succeeding teeth having different tooth heights, and has a trapezoidal tooth (or spur teeth) group, which is a succeeding tooth having a different set protrusion amount. May be a saw blade composed of three or more types.
[0053]
FIGS. 6A, 6B, and 6C show a sixth embodiment of the saw blade according to the present invention, in which the saw blade 6 comprises one group (seven patterns) of seven bee-shaped saw teeth. I have.
[0054]
Referring to FIGS. 6A and 6B, the trapezoidal tooth 6B, which is the leading tooth from the right to the left, and the first trailing tooth of the trapezoidal tooth 6B, which is the cutting tooth of the trapezoidal tooth 6B. A first right spur tooth 6FR1 having a cutting tooth protruding outward rightward in the width direction from the ridge line of the part and a first left spur tooth 6FL1 having a cutting tooth protruding leftward in the width direction beyond the ridge line. And a second succeeding tooth of the trapezoidal tooth 6B, the tooth height of which is smaller than the two teeth of the first right spur tooth 6FR1 and the first left spur tooth 6FL1, and the left-right direction than the two teeth. And two second right spur teeth 6FR2 and two second left spur teeth 6FL2 having a large set projection amount.
[0055]
By the way, among the succeeding teeth of the saw blade 6 having a group of seven teeth, a low tooth height group (6FR2, 6FL2) having a tooth height l composed of trapezoidal teeth (or spur teeth) and a high tooth having a tooth height h are included. There are two types of groups, high groups (6FR1, 6FL1). When the tooth height of the trapezoidal teeth 6B is b, the tooth height b> the tooth height h> the tooth height l.
[0056]
In addition, the set wedge amount w in the left-right direction of the second right flat tooth 6FR2 and the second left flat tooth 6FL2 in the low tooth height group having the tooth height l is the first right flat tooth in the high tooth height group having the tooth height h. The set 6 is set to be larger than the set n in the left-right direction of the tooth 6FR1 and the first left spur tooth 6FL1. Further, the number of teeth in the low tooth height group is greater than the number of teeth in the high tooth height group.
[0057]
To summarize the above description, in the succeeding teeth of the saw blade 6 having seven blades in one group, a saw tooth having a large set-projection amount in the left-right direction and a low tooth height is replaced with a saw tooth having a small set-projection amount and a high tooth height. It is characterized by being provided in more than the number.
[0058]
At the time of cutting using the saw blade 6 having the above-described configuration, the second right flat tooth 6FR2 and the second left flat tooth 6FR2, which are the succeeding teeth having the largest amount of horizontal set projection, with respect to the trapezoidal tooth 6B which is the leading tooth. The square tooth 6FL2 forms a kerf. At this time, by increasing the number of the second right spur teeth 6FR2 and the second left spur teeth 6FL2 with the largest amount of horizontal set projection, the second right spur teeth 6FR2 and the second left spur teeth are increased. The load received by the outer corner of 6FL2 can be distributed and received by many teeth.
[0059]
Thus, it is possible to suppress the progress of abrasion of the outer corners of the second right spur teeth 6FR2 and the second left spur teeth 6FL2 having the largest set protrusion amount. Further, since more teeth receive vibration in the thickness direction with respect to the vibration of the saw blade 6 in the thickness direction, the resistance to the vibration can be increased.
[0060]
With the above-described operation and effect, the bending resistance can be improved, and the life of the saw blade can be prolonged.
[0061]
FIGS. 7A, 7B and 7C show a seventh embodiment of the saw blade according to the present invention, which is a modification of the saw blade 6 described above.
[0062]
As shown in FIGS. 7 (a, b, c), the saw blade 7 is composed of eight bee-shaped saw teeth, forming a group (8-sheet pattern), and a trapezoidal tooth which is a leading tooth from the right to the left. 7B, a second right spur tooth 7FR2, a second left spur tooth 7FL2, a first right spur tooth 7FR1, a trapezoidal tooth 7B, a first left spur tooth 7FL1, a second right spur tooth 7FR2, which are succeeding teeth. The second left spur tooth 7FL2 has the same effect as the saw blade 6.
[0063]
Further, the above-mentioned saw blade 7 has three or more types of groups consisting of right flat teeth and left flat teeth, which are succeeding teeth having different tooth heights, and right flat faces, which are succeeding teeth having different set projection amounts. A configuration including three or more types of groups including teeth and left spur teeth may be employed.
[0064]
【The invention's effect】
According to the first, second or third aspect of the present invention, the number of set teeth having a large set protrusion amount is maximized to distribute the load applied to the corners of the set teeth having a large set protrusion amount during cutting. Has the effect of causing
[0065]
Further, it is possible to suppress the progress of abrasion at the corners of the set teeth where the abrasion amount is large, which is the fastest progress of the wear. Furthermore, since more teeth receive the vibration in the thickness direction with respect to the vibration in the thickness direction of the saw blade, the resistance to the vibration can be increased.
[0066]
With the above-described operation and effect, the bending resistance can be improved, and the life of the saw blade can be prolonged.
[Brief description of the drawings]
FIG. 1 is a view showing a first embodiment of a saw blade according to the present invention. 1A is a side view, FIG. 1B is a bottom view, and FIG.
FIG. 2 is a view showing a second embodiment of the saw blade according to the present invention. 2A is a side view, FIG. 2B is a bottom view, and FIG.
FIG. 3 is a view showing a third embodiment of the saw blade according to the present invention. 3A is a side view, FIG. 3B is a bottom view, and FIG. 3C is a cross-sectional view taken along the line CC.
FIG. 4 is a view showing a fourth embodiment of the saw blade according to the present invention. 4 (a) is a side view, FIG. 4 (b) is a bottom view, and FIG. 4 (c) is a DD sectional view.
FIG. 5 is a view showing a fifth embodiment of the saw blade according to the present invention. 5 (a) is a side view, FIG. 5 (b) is a bottom view, and FIG. 5 (c) is an EE sectional view.
FIG. 6 is a view showing a sixth embodiment of the saw blade according to the present invention. 6 (a) is a side view, FIG. 6 (b) is a bottom view, and FIG. 6 (c) is a sectional view taken along line FF.
FIG. 7 is a view showing a saw blade according to a seventh embodiment of the present invention. 7 (a) is a side view, FIG. 7 (b) is a bottom view, and FIG. 7 (c) is a GG sectional view.
[Explanation of symbols]
1-7 Saw blades 1S, 2S, 3S Straight teeth 1Rl, 2Rl, 3Rl Right set teeth 1Ll 2Ll, 3Ll with tooth height 1 Left set teeth 1Rh 2Rh, 3Rh with tooth height 1 Right set teeth 1Lh 2Lh, 3Lh with tooth height h Left set teeth b, l, h, S with tooth height h Tooth height n, w Set output (n <w)
SHL Tooth height reference position 4B, 5B, 6B, 7B Trapezoidal tooth 4F1 Trapezoidal tooth 4F2 which is a succeeding tooth Trapezoidal tooth (or spur tooth)
5F1 trapezoidal tooth 5F2 trapezoidal tooth (or spur tooth)
6FL1, 7FL1 First left spur tooth 6FL2, 7FL2 Second left spur tooth 6FR1, 7FR1 First right spur tooth 6FR2, 7FR2 Second right spur tooth

Claims (3)

A leading tooth group including at least one straight tooth, a first trailing tooth group including a plurality of set teeth, and the first trailing tooth having a tooth height smaller than a tooth height of the first trailing tooth group. A second trailing tooth group comprising a plurality of set teeth having a set protrusion amount larger than the set set protrusion amount, wherein the number of set teeth of the second trail tooth group is determined by the first subsequent tooth group. A saw blade characterized by providing more than the number of set teeth in a tooth group. A leading tooth group including at least one trapezoidal tooth, a first trailing tooth group including at least one trapezoidal tooth with left and right claws, and a tooth height smaller than the tooth height of the first trailing tooth group. A second trailing tooth group consisting of trapezoidal teeth or spur teeth having left and right set projections greater than the set projection of the first trailing tooth group. A saw blade, wherein the number of set teeth of the group is set to be larger than the number of set teeth of the first subsequent tooth group. A leading tooth group including at least one trapezoidal tooth, a first right flat tooth protruding rightward outside a ridge line of a cutting tooth of the trapezoidal tooth, and protruding leftward from a ridge line of a cutting tooth of the trapezoidal tooth. A first trailing tooth group having a plurality of teeth including the first left spur teeth, and a tooth height smaller than the tooth height of the first trailing tooth group, and A second succeeding tooth group including a plurality of set teeth including a second left spur tooth having a leftward set-off amount larger than the set-off amount and a second right flat tooth having a right-side set-off amount is provided. The saw blade provided, wherein the number of set teeth of the second trailing tooth group is set to be larger than the number of set teeth of the first trailing tooth group.

Images